How critical is the mix ratio of the Amazing Mold Putty?
The proper mix ratio is 1:1 by either weight or volume however, the Amazing Mold Putty is very forgiving and will cure even if you are off fairly significant amounts in either direction. Changing the ratio will not alter the speed in which the putty cures although it may change the physical properties and the finished mold may not be as tough or ever reach its optimum hardness.